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WWUS20 KWNS 221832

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KYZ000-MDZ000-OHZ000-PAZ000-VAZ000-WVZ000-230200-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 211

NWS STORM PREDICTION CENTER NORMAN OK

230 PM EDT WED MAY 22 2013



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  EASTERN KENTUCKY

  WESTERN MARYLAND

  EASTERN OHIO

  WESTERN AND CENTRAL PENNSYLVANIA

  SOUTHWESTERN VIRGINIA

  WEST VIRGINIA



* EFFECTIVE THIS WEDNESDAY AFTERNOON AND EVENING FROM 230 PM

  UNTIL 1000 PM EDT.



* PRIMARY THREATS INCLUDE...

  SEVERAL DAMAGING WIND GUSTS TO 70 MPH LIKELY

  SEVERAL LARGE HAIL EVENTS TO 1.5 INCHES IN DIAMETER POSSIBLE



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 70

STATUTE MILES EAST AND WEST OF A LINE FROM 20 MILES NORTHWEST OF

BRADFORD PENNSYLVANIA TO 60 MILES EAST SOUTHEAST OF JACKSON

KENTUCKY.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU1).



PRECAUTIONARY/PREPAREDNESS ACTIONS...



REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE

FAVORABLE FOR SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH

AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR

THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS

AND POSSIBLE WARNINGS. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY

DO PRODUCE TORNADOES.



&&



OTHER WATCH INFORMATION...CONTINUE...WW 210...



DISCUSSION...AS SUB-CLOUD LAPSE RATES CONTINUE TO STEEPEN LATE THIS

AFTERNOON...THERMODYNAMIC PROFILES WILL BECOME INCREASINGLY

FAVORABLE FOR STRENGTHENING SURFACE COLD POOLS WITH THUNDERSTORMS

NOW DEVELOPING ALONG AND WEST OF THE APPALACHIANS.  AS THESE BEGIN

TO CONSOLIDATE AND SUPPORT UPSCALE CONVECTIVE GROWTH...A BELT OF

30-40 KT SOUTH SOUTHWESTERLY LOWER/MID TROPOSPHERIC FLOW NOSING

THROUGH THE UPPER OHIO VALLEY TOWARD THE LOWER GREAT LAKES MAY

ENHANCE STORM MOTION AND THE RISK FOR POTENTIALLY DAMAGING WIND

GUSTS.



AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT

TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM

MOTION VECTOR 24035.





...KERR

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